It's not super clear to me what you're trying to do. Is the POS scanner a simple barcode reader? If so, many of them can operate as a plain keyboard instead, so

It's not super clear to me what you're trying to do. Is the POS scanner a simple barcode reader? If so, many of them can operate as a plain keyboard instead, so it would just enter whatever it scans into whatever text field has focus. If the POS reader is something more advanced, like an integrated POS tablet system (Square, etc.), are there any APIs you can use? Where does the "cloud setup" come in to play here... like are you on a local computer, with a POS attached, but mostly working in a remote desktop through an app? Or is the POS system itself attached to some other computer in the cloud (like in a colo datacenter or something)? Sorry for the confusion. What data are you trying to send, and to what?